Earlier this month, 200 Zappos employees moved into temporary offices just a few blocks from the old City Hall building, which will be its new corporate headquarters (it's currently in the midst of a $40 million renovation).

"Amazon knew we were running out of space, and we had to do something," Hsieh tells us. "I think Jeff Bezos thinks this is a really interesting experiment."

There are lots of shoes near the buying and merchandising departments. Zappos employees get a 40 percent discount on retail items.

The kitchens are stocked with free food and drinks. There's a different assortment in each kitchen, so that employees are more likely to walk around the building and have more "serendipitous" interactions with other colleagues.

Aimee Groth, Business Insider

Both kitchens are stocked with chips.

Aimee Groth, Business Insider

And drawers filled with candy and granola bars.

Aimee Groth, Business Insider

The office is lined with restaurant-style booths for meetings.

Aimee Groth, Business Insider

There are high tables everywhere to increase chance encounters. "That way, there's not that awkward, 'Should we keep standing or get a room?' moment," says our tour guide.

Aimee Groth, Business Insider

Zappos famously pays its employees $4,000 to quit if they don't like their jobs after training.

Aimee Groth, Business Insider

The conference rooms in the middle of the office are not particularly sound proof. Zappos is known for its transparent culture.